[논문]2단계(段階) 분리공정(分離工程)에 의한 3종(種) 혼합(混合)플라스틱의 마찰하전(摩擦荷電) 정전선별(靜電選別)

박철현; 전호석; 백상호; 박재구

2단계(段階) 분리공정(分離工程)에 의한 3종(種) 혼합(混合)플라스틱의 마찰하전(摩擦荷電) 정전선별(靜電選別)
Triboelectrostatic Separation of Mixed Three Kinds of Plastics by a Two-stage Separation Process 원문보기

資源리싸이클링 = Journal of the Korean Institute of Resources Recycling, v.16 no.5 = no.79, 2007년, pp.57 - 64

박철현 (한국지질자원연구원) , 전호석 (한국지질자원연구원) , 백상호 (한국지질자원연구원) , 박재구 (한양대학교)

초록
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유사비중의 범위에 있는 PVC, PET and PMMA 3종 혼합플라스틱의 마찰하전 정전선별이 2단계 분리공정을 통하여 수행되었다. PVC, PET and PMMA의 재질분리에 있어 효과적인 하전장치의 재질은 Polypropylene(PP) 과 high-impact polystyrene(HIPS) 임을 확인하였다. PP 싸이클론 하전장치를 이용한 1단계 분리공정에서, PVC의 품위와 회수율은 공기속도 10 m/s, 전기장의 세기 200 kV/m 이상, 분리대 위치 +2cm, 상대습도 30% 이하의 조건에서 각각 99.6%와 97.5%로 구하였으며, HIPS 싸이크론 하전장치를 이용한 2단계 분리공정으로부터, 공기속도 10 m/s, 전기장의 세기 250 kV/m, 분리대 위치 0cm, 상대습도 40% 이하의 조건에서 PMMA의 품위와 회수율을 각각 97.8%와 95.12%로 구하였다.

Abstract ▼ AI-Helper

Triboelectrostatic separation of mixed three kinds of plastics, PVC, PET and PMMA, in the range of similar gravity has been performed through a two-stage separation process. Polypropylene (PP) and high-impact polystyrene (HIPS) were found to be the most effective materials for a tribo-charger in the separation of PVC, PET and PMMA. In the 1st stage using the PP cyclone charger, PVC grade and recovery depended considerably on the air velocity (10 m/s), the relative humidity (200 kV/m) and the splitter position (+2 cm from the center) in the triboelelctrostatic separator unit. At an optimum condition a PVC grade of 99.6% and a recovery of 97.5% was achieved. In the 2nd stage using the HIPS cyclone charger, a PMMA grade of 98.3% and a recovery of 97.0% was obtained under the conditions of 10m/s air velocity, over 250 kV/m electric field, central splitter position and less than 40% relative humidity.

주제어

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문제 정의

This work aims at developing the effective triboelectrostatic separation technology of PVC, PET and PMMA by a two-stage separation process. Hence, we designed a laboratory scale triboelectrostatic separator unit including a fluidized bed cyclone tribo-charger and estimated a charger material affecting selective charging polarity and charge density of plastics.

대상 데이터

cage. The Faraday cage used in this study was Model KQ-1400 (Kasuga Denki Inc., Japan) and a measurement range was ±lnC ~ ±9999nC. The weight of particles was measured with an electronic balance (BP 2100s, Sartorius).
Triboelectrostatic separation systems were employed for the tests. Fig.

성능/효과

1% were obtained at the central splitter position. Also, a PMMA grade of 99.4% was obtained at the splitter position between -6 cm and the positive electrode although the PMMA recovery was comparatively decreased by 33.2%.
Such behavior of particles deteriorated the separation efficiency. Considering the results, a PVC grade of 99.6% and a recovery of 97.5% were obtained at the splitter position +2cm from the center to the positive electrode, which seems to be the optimum position. However, A PVC purity of 99.

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